15 Questions
What is the process called when magma cools and crystallizes to form igneous rocks?
Crystallization
What determines the type of crystals formed in igneous rocks?
Atoms and molecules contained in the magma
Where can igneous rocks be formed?
Above or below Earth's surface
What is the meaning of the word 'igneous'?
Fire
What are the two types of igneous rocks mentioned in the text?
Intrusive and extrusive igneous rocks
What is magma?
Molten rock under Earth's surface
What are igneous rocks formed from?
Magma cooling and crystallizing
What type of rock is granite?
Intrusive
What type of texture does obsidian have?
Glassy
What type of texture is characterized by two distinct sizes of minerals?
Porphyritic
Which rock contains a large amount of feldspar and quartz?
Granite
What is the silica content in mafic rocks?
45 to 55%
What type of rock is peridotite?
Ultramafic
What causes the bubbly texture in rocks like pumice?
High water and gas content
What type of cooling process results in aphanitic texture?
Fast cooling
Test your knowledge of igneous rocks with this quiz. Explore the formation, characteristics, and types of igneous rocks, and learn about their significance in the rock cycle.
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